| 700MW大型水轮机转轮裂纹原因分析 |
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| 引用本文： | 许宏伟,赵明,吴章勤,杨迎春,王进.700MW大型水轮机转轮裂纹原因分析[J].云南电力技术,2013(6):106-108. |
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| 作者姓名： | 许宏伟 赵明 吴章勤 杨迎春 王进 |
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| 作者单位： | 云南电网公司电力研究院,昆明650217 |
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| 摘 要： | 本文通过对某电厂ZG00Crl3Ni5Mo材料的700MW水轮机转轮裂纹进行实物取样，结合裂纹形貌和取样位置、化学成分分析、裂纹附近金相组织检验、裂纹断面电镜及能谱分析、裂纹断面分析等分析和试验结果，对该叶片裂纹的产生原因进行综合分析，造成裂纹的原因为：叶片局部区域产生共振，共振使叶片在弧坑处（B点含铜6．99％，可判断为电焊机电缆短路造成的弧坑）形成疲劳源并沿疲劳源处发展，形成疲劳裂纹。
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| 关 键 词： | 发电工程 裂纹原因 分析 大型水轮机转轮 |
Diagnose Analysis of Cracking on a 700MW Turbine Runner Blade |
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| XU Hongwe,ZHAO Ming,WU Zhangqin,YANG Yinchun,WANG Jin.Diagnose Analysis of Cracking on a 700MW Turbine Runner Blade[J].Yunnan Electric Power,2013(6):106-108. |
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| Authors: | XU Hongwe ZHAO Ming WU Zhangqin YANG Yinchun WANG Jin |
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| Affiliation: | (Yunnan Electric Power Research Institute, Kunming 650217) |
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| Abstract: | In this paper, a 700 MW turbine runner cracks sample with material of ZGOOCrl3Ni5Mo was analyzed, combined with methods of crack morphology, sampling location, chemical composition analysis, metallographic examination of the crack nearby ar- ea, cross - section SEM and EDS analysis, cross - sectional analysis. According to the analysis results, the causes of the blade cracks are because ： resonance occured in local area of blades, and formed fatigue source in the crater （ B point with 6.99% cop- per, can be judged as crater caused by welding cable short circuit）, developed along the source, and finally formed fatigue cracks. |
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| Keywords: | power generation engineering caused of cracks analysis large - scale turbine runner |
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